Time Calibration Method and System for Time Relay

Abstract

The present invention provides a time calibration method and system for a time relay, including two identical time relays, wherein the first time relay is the time relay to be tested, and the second time relay is the time relay for testing. It also includes a voltage regulator, an AC / DC converter, a calibration device, a first switch, a second switch, a third switch, a fourth switch, and an auxiliary power supply. The calibration device makes the signal input end of the first time relay and the input end of the second time relay be powered on simultaneously in response to the first switch, the second switch, and the third switch all being in the conducting state, and records the first time point T1; and, in response to the third switch being disconnected and the fourth switch being conducting, makes the input end of the second time relay be powered on for the second time, and records the second time point T2; the calibration device obtains a time calibration parameter according to the second time point T2, the first time point T1, and the calibrated delay time of the first time relay. The calibration scheme of the present invention is simple and easy to implement, and has a low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of time relays, and more particularly to a time calibration method and system for a time relay. Background Art

[0002] A time relay is a commonly used relay, including two types: power-on delay and power-off delay. After the relay obtains an input signal, a node action output occurs after a set time delay, thereby achieving a delayed action. It is usually used in low-voltage circuits or low-current circuits to control the on / off of high-voltage circuits or high-current circuits.

[0003] The testing and calibration of time relays currently mainly rely on digital stopwatches or millisecond meters, which usually require complex wiring and signal processing.

[0004] Prior art documents:

[0005] Patent document: CN104614671

[0006] Patent document: CN106707158

[0007] Patent document: CN110658449 Summary of the Invention

[0008] The purpose of the present invention is to provide a time calibration method and system for a time relay, which is calibrated by switching the power-on times of two identical time relays, is simple and easy to implement, and has a low cost.

[0009] To achieve the above object, the present invention provides a calibration system for a time relay, including two identical time relays. The first time relay is the time relay to be tested, and the second time relay is the time relay for testing. It also includes a voltage regulator, an AC / DC converter, a calibration device, a first switch, a second switch, a third switch, a fourth switch, and an auxiliary power supply;

[0010] The auxiliary power supply is configured to provide a maintenance voltage for the first time relay and the second time relay to operate;

[0011] The first switch is disposed between the voltage regulator and the AC / DC converter;

[0012] The second switch is disposed between the AC / DC converter and the signal input terminal of the first time relay;

[0013] The third switch is disposed between the signal input terminal of the first time relay and the input terminal of the second time relay;

[0014] The fourth switch is arranged between the delay output action node of the first time relay and the input end of the second time relay;

[0015] The calibration device is arranged to be connected with the second time relay;

[0016] Wherein, the calibration device makes the signal input end of the first time relay and the input end of the second time relay be powered on simultaneously in response to that the first switch, the second switch and the third switch are all in the on state, and records the first time point T1;

[0017] And, in response to the third switch being turned off and the fourth switch being turned on, the input end of the second time relay is powered on for the second time, and the second time point T2 is recorded;

[0018] The calibration device obtains a time calibration parameter according to the second time point T2, the first time point T1 and the calibrated delay time of the first time relay.

[0019] Preferably, the calibration device includes a time recording module and a calibration module, wherein:

[0020] The time recording module is used for recording the first time point T1 and the second time point T2;

[0021] The calibration module is used for obtaining a time calibration parameter T according to the description mode of T = T0 - △t, where T0 represents the calibrated delay time of the first time relay; △t represents the actually measured delay action time of the first time relay, and △t = T2 - T1.

[0022] Preferably, the calibration device is arranged to take the average value of the time calibration parameters obtained by multiple calibrations as the final time calibration parameter.

[0023] Preferably, the calibration device is integrated in the second time relay.

[0024] According to the disclosure of the present invention, a calibration method for a time relay is also provided, including:

[0025] Connect to the mains power supply and adjust the voltage regulator to the adapter voltage of the first time relay;

[0026] Provide a working maintenance voltage for the first time relay and the second time relay through an auxiliary power supply;

[0027] Turn on the first switch and the third switch, and then turn on the second switch, so that the signal input end of the first time relay and the input end of the second time relay are powered on simultaneously, and record the first time point T1;

[0028] Before the time delay action of the first time relay, disconnect the third switch and connect the fourth switch, so that the second time relay is powered on for the second time at the input end, and record the second time point T2;

[0029] The calibration device obtains a time calibration parameter according to the second time point T2, the first time point T1 and the calibrated time delay of the first time relay.

[0030] According to the disclosure of the present invention, a calibration system for a time relay is also proposed, which includes two identical time relays, wherein the first time relay is the time relay to be tested, and the second time relay is the time relay for testing. It also includes a DC voltage output module, an AC voltage output module, a time recording module, a calibration module, a DC switch, an AC switch, a third switch, a fourth switch and an auxiliary power supply;

[0031] The auxiliary power supply is configured to provide a working maintenance voltage for the first time relay and the second time relay;

[0032] The DC voltage output module and the AC voltage output module provide input signals for the first time relay and the second time relay in a one - select - two manner through a switch assembly;

[0033] The DC switch is arranged between the DC voltage output module and the signal input end of the first time relay;

[0034] The AC switch is arranged between the AC voltage output module and the signal input end of the first time relay;

[0035] The third switch is arranged between the signal input end of the first time relay and the input end of the second time relay;

[0036] The fourth switch is arranged between the delay output action node of the first time relay and the input end of the second time relay;

[0037] Among them, the time recording module is configured to record the first time point T1 when the signal input end of the first time relay and the input end of the second time relay are powered on simultaneously in response to both the DC switch / AC switch and the third switch being in the on state;

[0038] And, in response to the third switch being disconnected and the fourth switch being turned on, the second time relay is powered on for the second time at the input end, and the second time point T2 is recorded;

[0039] The calibration module is configured to obtain a time calibration parameter according to the second time point T2, the first time point T1 and the calibrated time delay of the first time relay. Description of the Drawings

[0040] In the accompanying drawings, each identical or nearly identical component shown in each figure may be denoted by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0041] Figure 1 is a schematic diagram of a calibration system for a time relay according to an exemplary embodiment of the present invention.

[0042] Figure 2 is a schematic diagram of a calibration system for a time relay according to another embodiment of the present invention. Detailed Embodiments

[0043] In order to better understand the technical content of the present invention, specific embodiments are hereby given and described in conjunction with the accompanying drawings as follows.

[0044] Aspects of the present invention are described herein with reference to the accompanying drawings, in which numerous illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to cover all aspects of the present invention. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of a number of ways, since the concepts and embodiments disclosed herein are not limited to any one implementation. Additionally, some aspects of the present disclosure may be used alone, or in any suitable combination with other aspects of the present disclosure.

[0045] Combined with Figure 1 A calibration system for a time relay according to the illustrated embodiment includes two identical time relays, wherein the first time relay RT1 is the time relay to be tested, and the second time relay RT2 is the time relay for testing.

[0046] As Figure 1 shown, the calibration system further includes a voltage regulator, an AC / DC converter, a calibration device, a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, and an auxiliary power supply.

[0047] As Figure 1 , preferably, a control switch K5 for controlling the DC power supply may also be provided at the auxiliary power supply terminal.

[0048] The voltage regulator can adjust the test voltage adapted to the first time relay according to the electrical parameters of the first time relay.

[0049] The voltage regulator may be a manual or electric adjustable voltage regulator with a wide voltage range output, for example, with a single-phase power of 500W - 3000W - 10KW, an input rated voltage of 220V, and an output voltage in the range of 0 - 250V. Thus, in Figure 1In the illustrated example, the 200VAC input from the mains power supply can be adjusted according to the electrical parameters of the time relay to be tested. In an alternative solution, the voltage regulator can also be configured with an input control switch for controlling the 220VAC input from the mains power supply to the voltage regulator.

[0050] The auxiliary power supply is set to provide a maintaining voltage for the operation of the first time relay and the second time relay, such as a 220V DC power supply.

[0051] As Figure 1 In the illustrated example, the first switch K1 is arranged between the voltage regulator and the AC / DC converter.

[0052] The second switch K2 is arranged between the AC / DC converter and the signal input terminals (IN+, IN-) of the first time relay RT1.

[0053] The third switch K3 is arranged between the signal input terminals (IN+, IN-) of the first time relay and the input terminals (IN+, IN-) of the second time relay RT2.

[0054] The fourth switch K4 is arranged between the delay output action node of the first time relay RT1 and the input terminals (IN+, IN-) of the second time relay RT2.

[0055] The calibration device is set to be connected to the second time relay, and in response to the first switch, the second switch, and the third switch all being in the conducting state, the signal input terminals of the first time relay and the input terminals of the second time relay are simultaneously powered on, and the first time point T1 is recorded; in response to the third switch being disconnected and the fourth switch being conducting, the input terminals of the second time relay are powered on for the second time, and the second time point T2 is recorded.

[0056] Thus, the calibration device obtains the time calibration parameter T based on the second time point T2, the first time point T1, and the calibrated delay time of the first time relay. In this way, the first time relay can be calibrated by the time calibration parameter T.

[0057] In an alternative embodiment, the time recording module includes a millisecond timer circuit.

[0058] In an alternative embodiment, the calibration device includes a time recording module and a calibration module. The time recording module is used to record the first time point T1 and the second time point T2. The calibration module is used to obtain the time calibration parameter T according to the description of T = T0 - Δt, where T0 represents the calibrated delay time of the first time relay; Δt represents the actually measured delay operation time of the first time relay, and Δt = T2 - T1.

[0059] In this way, the error time is determined by the difference between the nominal delay operation time of the first time relay and the actually measured delay operation time of the first time relay, and calibration is performed based on this as the calibration time.

[0060] Combined with Figure 1 As shown, during the calibration process, the conduction sequence of the first switch K1, the second switch K2, and the third switch K3 is the first switch K1, the third switch K3, and finally the second switch K2 is turned on. In this way, it is ensured that after power is supplied at the input end, the signal input end of the first time relay and the input end of the second time relay are powered on simultaneously.

[0061] Meanwhile, during the calibration process, the conduction of the fourth switch K4 satisfies: first, the third switch K3 is disconnected, and then the fourth switch K4 is turned on. The conduction time point of the fourth switch is before the delay operation of the first time relay. In this way, it is ensured that the fourth switch K4 is turned on before the delay operation, so that the second time relay can be powered on for the second time after the delay operation of the first time relay, and the time point of the second power-on is monitored.

[0062] In another embodiment, in order to obtain calibration time parameters more accurately, the method of taking the average value through multiple calibrations can be used. For example, the calibration device is set to use the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

[0063] As Figure 1 In the example shown, the calibration device is used as a separate module, connected to the second time relay, and performs timing reading and determination of time calibration parameters. In another embodiment, the calibration device can also be integrated into the second time relay to achieve system integration and miniaturization.

[0064] Combined with Figure 1 For the time relay calibration system shown, the process of its calibration method includes:

[0065] Connect to the mains power supply (such as 220VAC), and adjust the voltage regulator to the appropriate voltage of the first time relay;

[0066] Provide the working maintenance voltage to the first time relay and the second time relay through the auxiliary power supply;

[0067] Turn on the first switch and the third switch, and then turn on the second switch, so that the signal input end of the first time relay and the input end of the second time relay are powered on simultaneously, and record the first time point T1;

[0068] Before the delay operation of the first time relay, disconnect the third switch and turn on the fourth switch, so that the input end of the second time relay is powered on for the second time, and record the second time point T2;

[0069] The calibration device obtains a time calibration parameter according to the second time point T2, the first time point T1, and the calibrated delay time of the first time relay.

[0070] As described above, the calibration module obtains the time calibration parameter T in the form of T = T0 - Δt, where T0 represents the calibrated delay time of the first time relay; Δt represents the actual measured delay operation time of the first time relay, and Δt = T2 - T1.

[0071] Optionally, the calibration device can also be set to obtain the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

[0072] As Figure 1 shown, the calibration system is a DC calibration system. In some other embodiments, after removing the AC / DC converter, AC calibration can be performed.

[0073] Combined Figure 2 shown is a calibration system for a time relay according to another embodiment disclosed in the present invention, including two identical time relays, where the first time relay RT1 is the time relay to be tested, and the second time relay RT2 is the time relay for testing.

[0074] Compared with Figure 1 the embodiment shown, Figure 2 the comprehensive calibration system can perform both DC calibration and AC calibration.

[0075] Figure 2 The calibration system shown also includes a DC voltage output module, an AC voltage output module, a time recording module, a calibration module, and an auxiliary power supply.

[0076] The auxiliary power supply is set to provide a working maintenance voltage for the first time relay and the second time relay.

[0077] The DC voltage output module and the AC voltage output module provide input signals for the first time relay and the second time relay in a one - of - two - selection manner through switch components (K10, K20).

[0078] Among them, the DC switch K10 is arranged between the DC voltage output module and the signal input end of the first time relay.

[0079] The AC switch K20 is arranged between the AC voltage output module and the signal input end of the first time relay.

[0080] In an embodiment of the present invention, the DC switch K10 and the AC switch K20 are turned on in a one - of - two manner, so that at any time, only AC output or DC output is provided to the first time relay RT1 and / or the second time relay RT2.

[0081] The output voltages of the DC voltage output module and the AC voltage output module are both set to be adjustable to adapt to the time relay to be tested.

[0082] The third switch K3 is arranged between the signal input end of the first time relay and the input end of the second time relay.

[0083] The fourth switch K4 is arranged between the delay output action node of the first time relay and the input end of the second time relay.

[0084] Wherein, the time recording module is configured to respond to the DC switch K10 / AC switch K20 and the third switch being both turned on, so that the signal input end of the first time relay and the input end of the second time relay are powered on simultaneously, and record the first time point T1; and, in response to the third switch being turned off and the fourth switch being turned on, so that the second power - on of the input end of the second time relay is recorded, and the second time point T2 is recorded.

[0085] The calibration module is configured to obtain a time calibration parameter according to the second time point T2, the first time point T1, and the calibrated delay time of the first time relay.

[0086] As Figure 2 shown, the time recording module and the calibration module are integrated in the second time relay RT2. Of course, in another embodiment, the time recording module and the calibration module can also be electrically connected to the second time relay in the form of a separate circuit to record the power - on time signal and obtain the time calibration parameter based on this.

[0087] Preferably, the calibration module obtains the time calibration parameter T according to the description of T = T0 - △t, where T0 represents the calibrated delay time of the first time relay; △t represents the actually measured delay action time of the first time relay, and △t = T2 - T1.

[0088] Preferably, the calibration module is configured to take the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

[0089] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to what is defined by the claims.

Claims

1. A calibration system for a time relay, characterized in that, It includes two identical time relays, where the first time relay is the time relay to be tested, and the second time relay is the time relay for testing. It also includes a voltage regulator, an AC / DC converter, a calibration device, a first switch, a second switch, a third switch, a fourth switch, and an auxiliary power supply; The auxiliary power supply is configured to provide a working maintenance voltage to the first time relay and the second time relay; The first switch is arranged between the voltage regulator and the AC / DC converter; The second switch is arranged between the AC / DC converter and the signal input terminal of the first time relay; The third switch is arranged between the signal input terminal of the first time relay and the input terminal of the second time relay; The fourth switch is arranged between the delay output action node of the first time relay and the input terminal of the second time relay; The calibration device is configured to be connected to the second time relay; Among them, the calibration device responds to the first switch, the second switch, and the third switch all being in the conducting state, so that the signal input terminal of the first time relay and the input terminal of the second time relay are energized simultaneously, and records the first time point T1; among them, the conducting sequence of the first switch, the second switch, and the third switch is the first switch, the third switch, and finally the second switch; And, in response to the third switch being disconnected and the fourth switch being conducted, the input terminal of the second time relay is energized for the second time, and the second time point T2 is recorded; among them, the conduction of the fourth switch satisfies: first disconnect the third switch, and then conduct the fourth switch, where the conduction time point of the fourth switch is before the delay action of the first time relay; The calibration device obtains a time calibration parameter according to the second time point T2, the first time point T1, and the calibrated delay time of the first time relay.

2. The calibration system of the time relay according to claim 1, characterized in that, The calibration device includes a time recording module and a calibration module, where: The time recording module is used to record the first time point T1 and the second time point T2; The calibration module is used to obtain the time calibration parameter T in the description mode of T = T0 - △t, where T0 represents the calibrated delay time of the first time relay; △t represents the actually measured delay action time of the first time relay, and △t = T2 - T1.

3. The calibration system of the time relay according to claim 1 or 2, characterized in that, The calibration device is configured to take the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

4. The calibration system of the time relay according to claim 1 or 2, characterized in that The calibration device is integrated in the second time relay.

5. A calibration method for a time relay of a calibration system for a time relay according to claim 1, characterized in that, It includes: Connect to the mains power supply and adjust the voltage regulator to the adapted voltage of the first time relay; Provide a working maintenance voltage to the first time relay and the second time relay through the auxiliary power supply; Turn on the first switch and the third switch, and then turn on the second switch, so that the signal input terminal of the first time relay and the input terminal of the second time relay are energized simultaneously, and record the first time point T1; Before the delay action of the first time relay, disconnect the third switch and turn on the fourth switch, so that the input terminal of the second time relay is energized for the second time, and record the second time point T2, where the conduction time point of the fourth switch is before the delay action of the first time relay; The calibration device obtains a time calibration parameter based on the second time point T2, the first time point T1, and the calibrated delay time of the first time relay.

6. The calibration method of the time relay according to claim 5, characterized in that, The calibration module obtains the time calibration parameter T in the form of T = T0 - Δt, where T0 represents the calibrated delay time of the first time relay; Δt represents the actually measured delay operation time of the first time relay, and Δt = T2 - T1.

7. The calibration method of the time relay according to claim 6, wherein, The calibration device is configured to use the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

8. A calibration system for a time relay, characterized in that, It includes two identical time relays, where the first time relay is the time relay to be tested, and the second time relay is the time relay for testing. It also includes a DC voltage output module, an AC voltage output module, a time recording module, a calibration module, a DC switch, an AC switch, a third switch, a fourth switch, and an auxiliary power supply; The auxiliary power supply is configured to provide a working maintenance voltage to the first time relay and the second time relay; The DC voltage output module and the AC voltage output module provide input signals to the first time relay and the second time relay in a one - of - two - selection manner through a switch assembly; The DC switch is arranged between the DC voltage output module and the signal input terminal of the first time relay; The AC switch is arranged between the AC voltage output module and the signal input terminal of the first time relay; The third switch is arranged between the signal input terminal of the first time relay and the input terminal of the second time relay; The fourth switch is arranged between the delay output action node of the first time relay and the input terminal of the second time relay; Among them, the time recording module is configured to respond to the situation that both the DC switch / AC switch and the third switch are in the conducting state, so that the signal input terminals of the first time relay and the second time relay are energized simultaneously, and record the first time point T1; the conducting sequence of the DC switch / AC switch and the third switch is the DC switch / AC switch first, and then the third switch is conducted; And, in response to the third switch being disconnected and the fourth switch being conducted, the input terminal of the second time relay is energized for the second time, and the second time point T2 is recorded; the conduction of the fourth switch satisfies: the third switch is disconnected first, and then the fourth switch is conducted, and the conduction time point of the fourth switch is before the delay operation of the first time relay; The calibration module is configured to obtain a time calibration parameter based on the second time point T2, the first time point T1, and the calibrated delay time of the first time relay.

9. The calibration system of the time relay according to claim 8, characterized in that, The calibration module obtains the time calibration parameter T in the form of T = T0 - Δt, where T0 represents the calibrated delay time of the first time relay; Δt represents the actually measured delay operation time of the first time relay, and Δt = T2 - T1.

10. The calibration system of the time relay according to claim 8 or 9, characterized in that The calibration module is configured to use the average value of the time calibration parameters obtained from multiple calibrations as the final time calibration parameter.

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